Hibernaculum refers to a shelter or hiding place where animals, especially reptiles and insects, sleep or hibernate during the colder months of the year. Full definition
And it hibernates for eight months, sealed in its underground hibernaculum in the pitch dark... (newscientist.com)
Adult pumilus should be cooled separately, in a dry, darkened hibernaculum at temperatures averaging in the low 50's. (kingsnake.com)
I've surveyed rare orchids and an endangered dragonfly, participated in prescribed burns at our prairie site, and taken students to watch through night vision telescopes as bats exit from our hibernaculum. (science.sciencemag.org)